<template>
	<view class="u-menu-wrap">
		<scroll-view scroll-y scroll-with-animation class="u-tab-view menu-scroll-view" :scroll-top="scrollTop">
			<view v-for="(item,index) in tabbar" :key="index" class="u-tab-item"
				:class="[current==index ? 'u-tab-item-active' : '']" :data-current="index" @tap.stop="swichMenu(index)">
				<text class="u-line-1">{{item.name}}</text>
			</view>
		</scroll-view>
		<block v-for="(item,index) in tabbar" :key="index">
			<scroll-view scroll-y class="right-box" v-if="current==index">
				<view class="page-view">
					<view class="class-item">
						<view class="item-title">
							<text>{{item.name}}</text>
						</view>
						<view class="item-container">
							<view class="thumb-box" v-for="(item1, index1) in item.commodity" :key="index1">
								<image class="item-menu-image" :src="item1.img1" mode="" @click="getById(item1.id)">
								</image>
								<view class="item-menu-name">{{item1.name}}</view>
							</view>
						</view>
					</view>
				</view>
			</scroll-view>
		</block>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				tabbar: [],
				scrollTop: 0, //tab标题的滚动条位置
				current: 0, // 预设当前项的值
				menuHeight: 0, // 左边菜单的高度
				menuItemHeight: 0, // 左边菜单item的高度
				supplierId: null,
			}
		},
		created() {

			this.getSupplierIdByUrl();
		},
		methods: {
			/**
			 * 根据url获取店铺id
			 */
			getSupplierIdByUrl() {
				this.supplierId = this.$route.query.id;
				this.getTabbar();
			},
			/**
			 * 根据id查询商品信息
			 */
			getById(id) {
				const url = "/pages/productDetails/productDetails?id=" + id;
				uni.navigateTo({
					url: url,
					animationType: 'pop-in',
					animationDuration: 300
				})
			},
			//更新数据
			getTabbar() {
				const url = "http://localhost:8090/commodity/getTabbar/" + this.supplierId;
				uni.request({
					url: url,
					method: 'GET',
					header: {
						'content-type': 'application/json',
						'token': this.token
					},
					success: (res) => {
						this.tabbar = res.data.data;
						console.log(this.tabbar);
					},
					fail: (err) => {
						console.error('更新tabbar请求失败：', err);
					}
				});
			},
			// 点击左边的栏目切换
			async swichMenu(index) {
				if (index == this.current) return;
				this.current = index;
				// 如果为0，意味着尚未初始化
				if (this.menuHeight == 0 || this.menuItemHeight == 0) {
					await this.getElRect('menu-scroll-view', 'menuHeight');
					await this.getElRect('u-tab-item', 'menuItemHeight');
				}
				// 将菜单菜单活动item垂直居中
				this.scrollTop = index * this.menuItemHeight + this.menuItemHeight / 2 - this.menuHeight / 2;
			},
			// 获取一个目标元素的高度
			getElRect(elClass, dataVal) {
				new Promise((resolve, reject) => {
					const query = uni.createSelectorQuery().in(this);
					query.select('.' + elClass).fields({
						size: true
					}, res => {
						// 如果节点尚未生成，res值为null，循环调用执行
						if (!res) {
							setTimeout(() => {
								this.getElRect(elClass);
							}, 10);
							return;
						}
						this[dataVal] = res.height;
					}).exec();
				})
			},
		}
	}
</script>

<style>
	.u-wrap {
		height: calc(100vh);
		/* #ifdef H5 */
		height: calc(100vh - var(--window-top));
		/* #endif */
		display: flex;
		flex-direction: column;
	}

	.u-search-box {
		padding: 18rpx 30rpx;
	}

	.u-menu-wrap {
		display: flex;
		height: 100vh;
		background-image: linear-gradient(rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0.5)), url('https://web-tlias-mozi.oss-cn-beijing.aliyuncs.com/%E8%83%8C%E6%99%AF2.png');
		/* 替换为你的图片URL */
		background-size: cover;
		/* 覆盖整个容器 */
		background-position: center;
		/* 图片居中显示 */
	}

	.u-search-inner {
		background-color: rgb(234, 234, 234);
		border-radius: 100rpx;
		display: flex;
		align-items: center;
		padding: 10rpx 16rpx;
	}

	.u-search-text {
		font-size: 26rpx;
		color: $u-tips-color;
		margin-left: 10rpx;
	}

	.u-tab-view {
		width: 200rpx;
		background: linear-gradient(180deg, rgba(246, 246, 246, 0.9) 0%, rgba(216, 216, 216, 0.9) 100%);
		box-shadow: 2px 0 8px rgba(0, 0, 0, 0.2);
		border-right: 1px solid rgba(0, 0, 0, 0.1);
		animation: slideBg 5s infinite alternate;
	}
	@keyframes slideBg {
	    from { background-position: left bottom; }
	    to { background-position: right top; }
	}

	.u-tab-item {
		height: 110rpx;
		background: #f6f6f6;
		box-sizing: border-box;
		display: flex;
		align-items: center;
		justify-content: center;
		font-size: 26rpx;
		color: #444;
		font-weight: 400;
		line-height: 1;
		transition: background-color 0.3s, color 0.3s;
		/* 添加过渡效果 */
	}

	.u-tab-item-active {
		position: relative;
		color: #FFF;
		/* 活跃项使用更突出的颜色 */
		font-size: 30rpx;
		font-weight: 600;
		background: #007BFF;
		/* 活跃项背景颜色 */
	}

	.u-tab-item-active::before {
		content: "";
		position: absolute;
		border-left: 4px solid #FFF;
		height: 32rpx;
		left: 0;
		top: 39rpx;
	}

	.right-box {
		flex-grow: 1;
		background-color: rgba(255, 255, 255, 0.3);
		/* 右侧区域的半透明背景 */
		 min-width: calc(100% - 200rpx); /* 减去左侧栏宽度 */
	}

	.page-view {
		padding: 16rpx;
		min-height: 100vh;
		/* 确保即使内容不足也会填满整个高度 */
	}

	.class-item {
		margin-bottom: 30rpx;
		background-color: #fff;
		padding: 16rpx;
		border-radius: 8rpx;
	}

	.item-title {
		font-size: 26rpx;
		color: $u-main-color;
		font-weight: bold;
	}

	.item-menu-name {
		font-weight: bold;
		font-size: 24rpx;
		color: $u-main-color;
	}

	.item-container {
		display: flex;
		flex-wrap: wrap;
	}

	.thumb-box {
		width: 33.333333%;
		display: flex;
		align-items: center;
		justify-content: center;
		flex-direction: column;
		margin-top: 20rpx;
	}

	.item-menu-image {
		width: 120rpx;
		height: 120rpx;
	}

	.u-line-1 {
		font-weight: bold;
	}
</style>